Merge pull request #42 from dschatzberg/forSESA

Fixes for Clang building
Remove 'enable-baremetal' flag

Platform decided by host_os value. Configuration extended to support powerpc64.
Merge pull request #41 from jmcddn/forSESA

Remove 'enable-baremetal' flag. Added ppc64 case.
Hello world run as linux-gnu target on powerpc64

Build on ppc64 using native gcc-4.8.1
Merge pull request #43 from jmcddn/forSESA

Hello world run as linux-gnu target on powerpc64
Make Console pure virtual

This makes way for us to add a serial console ebb for a new app
Add HelloEbb app

This app just makes a LocalConsole write (ebb call)